Question

x^{2}- 6x+8=0
x^{2}-5x+6=0

Answer 1

X^2 - 6X + 8 = 0
D = 36 - 32 = 4 ; √ D = 2 
X1 = ( 6 + 2 ) : 2 = 4 
X2 = ( 6 - 2 ) : 2 = 2 
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X^2 - 5X + 6 = 0
D = 25 - 24 = 1 ; √ D = 1 
X1 = ( 5 + 1 ) : 2 = 3 
X2 = ( 5 - 1 ) : 2 = 2